v0.2.1

Bugfix release.

What's Changed

• Small fixes by @smfleming in #4
• Fix bug in numpy tutorial
• Bump python version to >= 3.8 (also in CI and on website)
• Add notebook to requirements

Full Changelog: v0.2.0...v0.2.1

v0.2.0

Upgrade to new Jupyter book version.

Pre-course draft release

This is introPy's first release. All materials are included, but not yet battle tested (course is in January 2021).